Internal Program Version: x264  0.164

x264 is a free library for encoding next-generation H264/AVC video
streams. The code is written from scratch by Laurent Aimar, Loren
Merritt, Eric Petit (OS X), Min Chen (vfw/asm), Justin Clay (vfw), Mans
Rullgard, Radek Czyz, Christian Heine (asm), Alex Izvorski (asm), and
Alex Wright. It is released under the terms of the GPL license. This
package contains a static library and a header needed for the
development with libx264. This library is needed to build
mplayer/mencoder with H264 encoding support.

http://developers.videolan.org/x264.html